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442528 (2011 WB109)
Classification: Main-belt Asteroid          SPK-ID: 2442528
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1424305485236227 4.8361e-08  
a 2.976422730987475 4.9226e-08 au
q 2.552489208774749 1.5148e-07 au
i 11.75505265946163 6.8654e-06 deg
node 119.3752896736998 2.8594e-05 deg
peri 246.2185523414963 3.8979e-05 deg
M 285.4901862784782 3.0916e-05 deg
tp 2459388.696238263298
(2021-Jun-23.19623826)
0.00016722 TDB
period 1875.600525550918
5.14
4.653e-05
1.274e-07
d
yr
n .1919385258725376 4.7616e-09 deg/d
Q 3.4003562532002 5.6237e-08 au
  Orbit Determination Parameters
   # obs. used (total)      125  
   data-arc span      5487 days (15.02 yr)  
   first obs. used      2004-05-14  
   last obs. used      2019-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62626  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:43:21  

Additional Information
 Earth MOID = 1.5766 au 
 Jupiter MOID = 2.11961 au 
 T_jup = 3.214 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457325.5 (2015-Oct-30.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1438384141708361 4.8238e-08  
q 2.545340822346643 1.5062e-07 au
tp 2457520.583427379161
(2016-May-12.08342738)
0.00014071 TDB
node 119.4247200809754 2.864e-05 deg
peri 247.0569256349823 3.8897e-05 deg
i 11.75013610486671 6.8628e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      125  
   data-arc span      5487 days (15.02 yr)  
   first obs. used      2004-05-14  
   last obs. used      2019-05-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62626  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 07:43:21  

Additional Information
 Jupiter MOID = 2.11961 au 
 T_jup = 3.214 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.326903967539298E-15 -6.975396453287863E-15 -1.953634138325451E-13 -1.99077745132961E-14 2.105651092865302E-14 2.158997980112896E-15
q -6.975396453287863E-15 2.268620230653613E-14 3.094725509904958E-12 6.798764509667096E-14 3.555542140203068E-13 -3.900656472881458E-15
tp -1.953634138325451E-13 3.094725509904958E-12 1.98000732682758E-8 4.670396145849471E-11 3.737143429592312E-9 -8.717457748960589E-12
node -1.99077745132961E-14 6.798764509667096E-14 4.670396145849471E-11 8.202596462472319E-10 -7.939424432651157E-10 -3.823587044168516E-11
peri 2.105651092865302E-14 3.555542140203068E-13 3.737143429592312E-9 -7.939424432651157E-10 1.513001237811209E-9 3.567331180467789E-11
i 2.158997980112896E-15 -3.900656472881458E-15 -8.717457748960589E-12 -3.823587044168516E-11 3.567331180467789E-11 4.70986996194684E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO437721  

442528 (2011 WB109)          Discovered 2008-Feb-14 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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